Car dumper



E. H. KIDDER CAR DUMPER July 1, 1930.

Filed June 25, 1928 8 Sheets-Shet July 1, 1930. E. H. KIDDER 1,768,849

' CAR BUMPER Filed June .25. 1928 8 Sheets-Sheet 2 vgleavai,

E. H. KIDDER GAR DUMPER.

July 1, 1930.

Filed June 23, 1928 8 Sheets$heet 5 72 Vzzlor 27%; Hfl'a aer QM vJftarzzgyu.

July 1, 193,0. E, KlDDER I 1,768,849

CAR DUMPEP.

Filed June 23, 1928 a sheets-sh t 4 @MYQZL E. H. KIDDER CAR DUMPER '8Sheets-Shet Filed June 25, 1928 July 1, 1930.

E. KIDDER CAR DUMPER Filed June 25, 1928 s Sheets-Sheet 6 E. H. KIDDERJuly 1, 1930.

CAR DUMPER 8 Sheets-Sheet Filed June 23, 1928 L ib/Keys E. H. KIDDERJuly 1, 1930.

CAR DUMPER Filed June 23, 1928 8 sheets-sheet 8 reass ss-J na, ieeo EL3. xmnnn; or cnrcneo, ILLINOIS, assrenon TQ Humane-r r-zenroaeo, rumors,a conrom'rron or rumors CAR 2) Application filed June 23,

This invention relates to a car dumper. It has for one object to providea clamping mechanism for-'holdiifg'a car in position on the rotatingframe during the dump. Another object is to provide means for operatingthe clamping mechanism so that it functions automatically in response tothe movement of the rotating frame. Another object is to provide, inconnection with such operating mechanism, compensating means whereby theclamps in this movement are automatically adjusted to any size of thecar. Other objects will appear from time to time in the course of thespecification and claims.

The invention is illustrated more or less diagrammatically in theaccompanying drawings wherein:

Figure 1 is an end elevation with parts in section and parts brokenaway, showing one form of the device in its upright position;

Figure 2 is a vertical longitudinal sectional view taken on line 22 ofFigure 1, looking in the direction of the arrow;

Figure 3 is a view similar to Figure 2, taken on line 3--3 of Figure 1looking in the direction-of the arrow;

Figure 4 is a transverse vertical cross section taken on line 44 ofFigure 3, showing the dumper in the upright position;

Figure 5 is a view similar to Figure 4, showing the dumper in itsextreme dumping position;

Figure 6 is an enlarged detail showing a part of the lifting cableoperating mechanism;

Figure 7 is a large sectional view taken approximately on line 77ofFigure 4;

Figure 8 is a view generally similar to Figure 4, showing a modifiedform of cable arrangement;

Figure 9 is a view showing the modified form in the tipped position;

Figure 10 is a detail of the cable mounting for the counter-weight, ofthe modified form shown in Figure 9.

Like parts are indicated by like characters throughout the specificationand drawings.

The car dumper as a whole in the form illustrated herewith is situatedartially in an excavation A which is provi ed with walls 1928. Serial m.287,811.

'work which carries the car and the detailed car supporting and clampingmechanism. Located within the frame work is a car transfer platform B Itis supported on rollers 13* which are themselves carried on trackmembers 13 supported within the structure. This transfer platform ismounted for limited lateral movement within the frame. A spring assemblyB serves to assist gravity and tends to limit the movement of thetransfer platform. The details of this mounting will not be furtherdescribed, as they form no part of the present invention, which is notlimited to any particular type of platform mounting.

B is an apron extending along one side of the dumper as a whole withinthe opening B Against it the car rests during the dumping operation. B,B are tracks mounted on the ring members B. They are in contact withpairs of flanged supporting rollers 13 which are carried in yoke membersB which are themselves pivotally supported as at 13 in bearing supportsB.

I shall now describe the mechanism by means of which the dumper isrotated for dumping. A cable C is positioned about the end of thedumper, particularly about the members B. It does not extend completelyabout the ring. It is secured at each end to a fastening member C whichis carried in a spring mounting C on the member B. The cable-C ispositioned about a driving member C which may be rotated by any suitablemeans. Rotation in one direction will revolve the dumper. Rotation inthe opposite direction will return it to its upright position. Two suchcables, one at each end, will generally be used.

T e clamp itself comprises a carriage member D which slides in theguides D. D is a clamping part pivoted to the member I) as at D. It ismounted for limited pivotal movement. D is a slot and D is a pin mountedon the clamping part D and projecting through the slot 1)".

When the dumper is in the upright position, for example, as shown inFigure 4, the

clamp is held'away from the car. For this purpose it is provided with alifting rope or cable F. It is showngenerally in the figures and a pearsin detail in Figure 6. The lifting cables appear also in Figure 2. Asshown there, one such lifting cable is provided for each of the clamps.Each cable passes over a sheave F two cables being carried to the right,as viewed in Figure 9. and two to the left. These pairs of cables arejoined to form a single cable passing over a sheave F down about guidingsheaves F, F. One end of the cable F is attached to a carriage F. Thiscarriage is provided with wheels or rollers F", F which run in a curvedguide track F. The carriage F. is provided with a contact member F whichis adapted to engage the buffer part F on one of the wheel carriages B.From the sheave F the cable F passes about a sheave F and is dead-endedto the clamp D as at F. When the damper is inthe upright position thecarriage F is carried to the position shown in Figure 6. In thatposition the lifting cable F is drawn out to ap roximately the limit ofits travel and the c amping assembly is thus held in its upper-mostposition. There are generally carriages for each dumper.

G is a take-u cable which passes about the sheave G ownward aboutsheaves G and G and is dead-ended on a drum portion G. From the sheave Gthe take-up cable passes about a sheave G which is mounted on the clampcarriage D. It passes thence upward about a sheave G" also mounted onthe clamp carria e across the beam D over the sheave G at the oppositeside of the mem-- ber D, beneath the sheave G about the sheave G whichis fixed on the frame work, and thence over the sheave G and is dead--ended at G on one end of the member G.

H is a holding cable dead-ended on a drum portion H. It extendstransversely across the frame, passi upwardly about the sheave H, overthe sheave H on clan'ipcarriage I), across the clamp, over the sheave Hon the clamp member I) downward and thence upward about a sheave H onthe frame and is dead-ended on the lower end of the member G The memberG is pivotally mounted on the short arm I of the bell crank which isitself pivoted at I on the frame and has the longer arm I I is acounter-weight cable pivoted as at I on the outer end of the bell crankarm I and passes over a sheave I which is mounted at the upper end in acounter-weight frame I. It passes thence about a sheave I which ismounted on the counter-weight I thence upwardly about the sheave I whichis itself also mounted at the upper end of the counter-weight frame I.Thence it passes back towards the dumper and in one position of thedamper it is received in a guide I and also in an oppositely placedguide I. It is dead-ended as at I on a part of the frame.

Figure 7 shows the drum construction. This construction has previouslybeen partially described as; formed on the drum section G and HCentrally between. these drums is located a brake section J. Preferablthe winding parts of the brake section an the drums are made integrally,although this is not essential. About the member J is positioned a brakeband J One end of the band is fastened as at J 2 to a brake le'ver Jwhich is itself pivoted at approximately the point J The other end ofthe brake band J is fastened to the lever J 8 at J J 5 is a compressionspring which, when released, moves the lever J outwardly or downwardly,as shown in Figure 4, to apply the brake and lock the drums J is a camlever pivoted at J provided in its outer end with a roller J a whichoperates against the curved cam member J This cam member is providedwith an outwardly bent orsloping portion J The cam J J" is preferablymounted on the foundation. J is a reach rod pivoted at one end on thecam lever J At its other end it is pivoted on a lever J which is mountedon the shaft J carried in bearings secured to the rotating frame.Extending from the lever J mounted u on the shaft J is a connecting rodJ w ich is fastened ad'aoent the outer end to the lever J The sha Jpreferably extends the full distance covered by the four individualclamps; thus one controlling lever J actuated by the cam J 9 issufficient for controlling the lurality of lovers J which in turnoperate t e individual brake lever J a with their associated brake bandsJ There is shown in Fi ures 8, 9 and 10 a slightly modified form of thedevice. In operation is essentially the sal'ue as the preceding formexcept that the l Iting rope is modified. As shown in the t sevenfigures, there our p liftii cables, one for and these cables 2:. takenin pairs to the end of the dumper and then connected with thecontrolling mechanism, as shown particularly in Figure 6. In themodified form the lifting cables are separate and are not joinedtogether or taken to the carriage F Each lifting cable is led separatelydown and separately terminated. Therefore, as shown in Figures 8, 9 and10, the parts remain the same, with the exception of the .re-arrangementof the lifting cables. Instead of the lifting cables shown in theearlier figures, a separate cable L is provided for each of the clampingassemblies. It is dead-ended at L The clamp cable passes upwardly overthe sheave L downward over the sheave L on the rotating frame and thenceover the sheave L which is supported from the foundation. From thesheave L it passes about a sheave L and is dead-ended on a rod L whichis spring held by means of the spring L which is supported from bracketsmounted on the foundation. L is a counter-weight to which the sheave Lis attached and L is a frame member about the sheave and attached to thecounter-weight. It is adapted to serve as a guiding member and to engageguides L, L in which the counter-weight travels. L", L are stops mountedon the supporting frame work of the counter-weight and adapted to limitthe upper upward movement of the counter-weight. L is an idler sheavemounted on'the rotating frame work. In the upright position the liftingcable is not in contact with-L As the rotation occurs, the lifting cableis brought into contact-with L, and as shown in Figure 9, in the extremedumping position the cable is about this sheave L". L is a curvedbuflfermember mounted on an extending portion of the rotating frame. When thedumper is in the extreme dumping position, the lifting cable L, afterpassing over the idler sheave L is in contact with the buffer portion L,as shown in Figure 9. L is an idler sheave which serves to position andprevent displacement of the cableL.

The lifting cables F serve the dual purpose of lowerin and lifting theclamps.

Although I have shown and described an operative device, it will beobvious that many changes might be made in the number, size, relation,proportion and distribution of parts without departing materially fromthe spirit of my invention, and I wish, therefore, that my descriptionand drawings be considered in a large measure diagrammatic. Inparticular, the drum construction might be modified in many ways. Forconvenience two cable winding portions are provided and a brake drumopposite them. This arrangement might be almost infinitely varied. Thecoun terwveight frame of course need not be mounted upon the mainfoundation of the entire dumping assembly. It is sufiicient if it issefi5 curely mounted near the rotary frame so that the cable arrangementshown can be conveniently effected.

The use and operation of the invention as shown in the form illustratedin the first seven figures is generally as follows:

The parts, when the car is placed in andremoved from the rotating frameand before rotation takes place, and after it has-been completed, arenormally held in the position shown in Figures 1, 2, 3 and 4. Figure 6is also a detail of some of the parts at this time. The car is run on tothe dumper, being positioned on the tracks which are fastened to thetransfer platform. The rotating mechanism is started and by means of thecables C which are fastened about the end rings of the rotating frame,the rotating frame as a whole commences to revolve, rotating as shown inFigures 1 and 4 in a counterclockwise direction. As rotation commences,the transfer platform moves laterally to the left, as viewed in Figures1 and 4. The lifting cable F is partially released or paid out withrespect to the dumper; although it is and remains fixed with relation tothe carriage F and the foundation, the rotation of the revolving frame,in effect pays out the cable with relation to the rest of the dumper andthe clamp is thus permitted to move downward in response to thisrotation of the revolving frame. As this rotation takes place, theholdin cable H is wound about the drum portion 1 because as the clampdescends the take-up cable G is unwound from the drum portion G, thusro-.

brake band is released, permitting freerotation of the drumG, H

In the form here shown, after about 30 of a revolution has taken place,the clamp will be properly seated on the car, even on the lowest carnormally used. Therefore, in the invention as illustrated, the length ofthe cam is such that at about the time the roller J 8 runs off the cam,the compression spring thus becomes effective, the brake lever is movedso as to lock the brake on the drum and prevent further movement of thecables H and G. The cables are thus anchored. As the revolvingcontinues, the end of the pivoted bell crank lever I, I swings above thesheave on the top of the counterweight'frame and thus changes thedirection of the pull of the counter-weight and causes the short end ofthe lever to pull away from its stop K an amount equal to the slightstretch in the holding cable H which is fastened at one end to themember G which is itself pivoted on the short end of the bell cranklever I.

Sufiicient counterweight I is provided to hold the heaviest car firmlyagainst the rails under all normal conditions of operation and toprovide for immediate follow-up or takeup movement on the holding cablein case a lump of coal or other material which may have been caughtunder one of the clamps becomes dis-lodged or crushed during the dumpingoperation.

Under normal circumstances the counterweight is suflicient of itself tohold the heaviest car without its load in the final over-turnedposition, but when the contents of the car are solidly frozen into thecar, which may happen, the external counter-weight will be overowderedor raised, permitting the bell crank ever to rotate backward the slightamount of stretch in the holding cable due to the load of the car andits contents. That is to sa permitting the arm I to rotate to the le t,as shown in Figure 5. A limited rotation in. this direction can takeplace before the inner end of the arm I again comes in contact with thestop K. The necessary additional force required to hold the car and loadfrom drop ping will then be provided by the reaction of the leveragainst this stop. In this way suflicient emergency holding power isprovided to meet any possible condition of frozen loads or otherfailures of the load for other reasons to be discharged without applyingexcessive ressure on the cars during normal operating conditions. If acounter-weight were used which alone was sufficient to hold the heaviestcar and its load, each car, no matter what its size or weight, would besubjected to the same clamping pressure as that required for theheaviest under the most extreme and unusual conditions of operation, andthis would likely result in damage to small or light cars. It isto avoidthis that the variable pressure clamping arrangement above described forunusual conditions has been provided.

The use and operation of the modified clamp lifting arrangement shown inFigures 8, 9 and 10 is as follows:

The rotatin mechanism and the holding and take-up ca les are the sameaspreviously described, thus their description will not be re di erent.When the revolving frame or cradle is in its u -right position, thelifting- Eeated. The lifting cable arrangement is shown-in- Figure 9.The operation of the clamp parts and the lifting cable is the same ingeneral effect as previously described. As described above, there is inthe modified form usually one lifting cable for each clamp, althou thisnumber might be modified.

I c aim: 1. In combinatidn in a car dumper, a rotary dum ing framemounted for rotation, a car hol ing clamp, means for raising andlowering the same in response to rotation of the rotary dumper frame andclamping and takeup cables adapted to hold the clamp in osition on thecar, the clamping cable only eing adapted to support the load of the caron t e clamp during dumping, the take-up cable adapted to take up slackwhich may develo durin" the dumping, and means for operating said cablesin response to movement of the dumper, said means including a drum, theclamping and take-up cable s bem oppositely wound about said drum, saidrum provided with a brake and means for locking said drum againstrotation in certain positions of the rotary frame.

I 2. In combination in a car dumper, a retary dumping frame mounted forrotation, a car holding clamp, means for raising and lowering the samein response to rotation of the rotary frame and clamping and take-upcables adapted to hold the clamp in position on the car, the clampingcable' only being adapted to support the load of the car on the clamp,durin dumpin the take-up cable adapted to ta e up slac I which maydevelop during the dumping, and means for operating said cables inresponse to movement of the rotary dumping frame, said means includin adrum, the clamping and take-up cables being oppositely wound about saiddrum, said 'drum having a brake portion, there being means for lockingsaid drum against rotation in certain ositions of the rotary dumpingframe, sai lockin means inclu ing a cam track adjacent said dumper, saidtrack diverging away from said rotary dumper frame throu bout a portionof its length, a spring to Ice the brake mechanism and a lever adaptedto contact said track, and an operating connection between said springand said lever whereby, when said lever is in contact with one portionof said track, the spring is held against movement and the brake isunlocked, permitting rotation of the drum.

3. In combination in a rotary car dumper, a rotary dumping frame, a carsupporting member and a clamp, a lifting cable attached to said clamp atone end and at its other end to a shoe, a track along which said shoe isadapted to travel, a bufi'er a inst which said shoe strikes and throughw ich, in response to motion of the rotary dumper frame, the

means adapted, when the dumper is in one position to prevent rotation ofthe drum and in another position to permit'it, a cable receivlng portionon said drum, a lever pivoted on said rotary frame, a clamping cabledeadended at one end upon said drum and deadended at the other upon saidpivoted lever, a take-up cable dead-ended at one end on the pivotedlever, passing about the dumper, about the clamp and being dead-ended atits other end upon the drum assembly the two cables being oppositelywound about the drum, the said lever being pivotally mounted on therotary dumping frame in combination with a cable which has oneendattached to the free end of the lever and its other end attached tothe frame of the dumper.

4. In combination in a rotary car dumper, a rotary dumping frame, a carsupporting member and a clamp, a lifting cable attached to said clamp atone end and at its other end to a shoe, a track along which said shoe isadapted to travel, a buffer mounted apart from said frame against whichsaid shoe strikes and through which, in response to motion of'ftherotary dumping frame the lifting cable is moved with relation to therotary dumping frame as a whole, a drum assembly mounted on said dumper,braking means adapted, when the dumper is in one position to preventrotation of the drum and in another position to permit'it, a cablereceiving portion on said drain, a lever pivoted on said frame, theclamping cable dead-ended at one end upon said drum andiibeing deadendedat the other upon said pivoted. lever, a take-u cable dead-ended atoneend on the pivote lever, passing about the dumper and about the clampand being dead-ended at its other end upon the other cable receivingportion of the drum assembly, the two babies being oppositely woundabout the drum,thesa id lever being pivotally mounted on the dumpingframe in combination with a cable which has one end attached to theouter end of the lever.

5. In combination in a rotary car dumper, a rotary dumping frame, a carsupporting member and a clamp, a lifting cable attached to said clamp atone end and at its other end to a shoe, a track along which said shoe isadapted to travel, a lender mounted apart from the rotary frame againstwhich saidshoe is adapted to strike and through which, in response tomotion of the dumper, the lifting cable is moved with relation to therotary dumper frame as a whole, a drum assembly mounted on said dumper,braking means adapted, when the dune or is in one position to preventrotation 0 another position to permit it, a cable receiving portion onsaid drum, a lever pivoted on said frame, a clamping cable dead-ended atone end upon said drum and being deadended at the other upon saidpivoted levena the drum and inlever, there being a counter weightsupported from a point apart from the rotary frame and engagin the saidlast mentioned cable, the lever belng held in position against a stop bythe influence of the counter weight when the frame is in the up-rightposition and being moved out of contact with this member when the frameis in the dumping position.

6. In combination in a rotary car damper, a rotary dumping frame, a carsupporting member and a clamp, a lifting cable attached to said clamp atone end and at its other end to a shoe, a track concentric with thedumper along which said shoe is adapted to travel, a buffer supportedapart from. the rotary frame against which said shoe strikes and throughwhich, in response to motion of the rotary dumper frame, thelifting'cable is moved with relation to the rotary dumper frame as awhole, a drum assen'ibly mounted on said dumper, breaking means adapted,when the rotary dumper frame is in one position to prevent rotation ofthe drum and in another position to permit it, a cable receiving portionon said drum, a lever pivoted on said rotary frame, the clamping cabledead-ended at one end upon said drum and passing about the rotary dumperframe, about the clamp, and being dead-ended at the other upon saidpivoted lever, a take-u cable dead, ended at one end on the pivotedlever,. passing about the rotary dumper frame, about the clamp and beingdeadended at its other end upon said drum, the two cables beingoppositely wound about the drum, the said lever being pivotally mountedon the rotary dumping irame in combination with a cable which has oneend attached to the outer end of the lever, its other end attached tothe rotary framed the damper, at apomt substantially opposite the pivotpoint of the lever, there being a counter-weight supported from a pointapart from the rotary frame and engaging the said last mentioned cable,the lever being held in position against a stop by the influence of thecounter-Weight when the rotary frame is in the upright position andbeing moved out of contact with this member when the rotary frame is inthe dumping position.

Z. In a rotary car dumping mechanism, a rotaryodumping frame, a carsupporting plot.

form and a clamp, movably mounted on the rotary dumper frame, means forholding said clamp free from the car, in one position of the rotaryframe, means for causing it to move to engage the car when the dumperframe is changed in position, means for holding it ositively on the carand means for increasmg its pressure upon the car, such means her and acar clamping member in combinetion with hoisting, lowering and clampingmeans adapted to move and control said car clamping member, said clampbeing formed to inclose said hoisting, controlling and clamping means toprotect the same from inyv 1 9. In combination in a rotary car dumper, arotary dumping frame, a car carrying member and a car clamping member incombination with hoisting, lowering and clamping means adapted to moveand control said car clamping member, said clamp and associated partsbeing formed to inclose said hoisting, controlling and clamping means toprotect the same from injury.

10. In combination in a rotary car dumper, a rotary dumping frame, a carcarrying member and a car clamping member in combination with cablesadapted to raise and hold the clam free of the car when the rotarydumping ame is in the upright position and to draw and hold the clamp onthe car when the rotary frame is in the dumped position, the clamp beingformed to inclose the said cable, whereby the same are protected frominjury.

11. In a car dumper, a rotatable cradle, a clamp movable thereon towardand from a car, sheaves on the cradle and the clamp, a lever pivoted onthe cradle, a drum rotatable on the cradle, means operative onl when thecradle has reached an interme iate tilted position for lockin the drum aainst rotation, a holding ca lo and a taie-up cable arranged generallyin parallel and encir' cling the clamp, each being dead-ended on andwound in opposite directions about the drum and dead-ended on andleading in opposite directions from the lever, both cables travellingover the sheaves on the clamp and the cradle so that movement of theclamp shortens one and lengthens the other cable, to cause one to bewound upon and the other to be paid oil of the drum.

12. In a car dumper, a rotatable cradle, a clamp movable thereon towardand from 9.

car, sheaves on the cradle and the clamp, a lever pivoted on the cradle,a drum rotatable on the cradle, means operative only when the cradle hasreached an intermediate tilted position for locking the drum againstrotation, a holding cable and a take-up cable arranged generally inparallel and encirclin the clamp, each being dead-ended on an. wound inopposite directions about the drum and dead-ended on and leading inopposite directions from the lever, both cables travelling over thesheaves on the clamp and the cradle so that movement of the clampshortens one and lengthens the other cable, to cause one to be woundupon and the other to be paid off the drum, a counterweight, a supporting structure therefor separate from the cradle and a connection betweenthe counterweight and the lever.

13. In a car dumpcr, a rotatable cradle, a

clamp movable thereon toward and from a car, sheaves on the cradle andthe "clamp, a lever pivoted on the cradle, a drum rotatable onthecradle, means operative only when the cradle has reached an intermediatetilted position for locking the drum against rotation, a holding cableand a take-up cable ar ranged generally in parallel and encircling theclamp, each being dead-ended. on and wound inopposite directions aboutthe drum and dead-ended on and leading in opposite directions from thelever, both cables travelling over the sheaves on the clamp and thecradle so that movement of the clamp shortens one and lengthens theother cable, to cause one to be wound upon and the other to be paid offthe drum, 9. counterweight, a supporting structure therefor separatefrom the cradle and a connection between the counterweight and thelever, a stop for the lever against which it is held by the tension ofthe holding cable, the counterweight be ing adapted as the cradleapproaches the dumping position to tend to move the lever away from thestop to exert an increased tension on the holding cable.

14. In a car dumper a clamp, guides along which it is adapted to traveltoward and'from a car, sheaves on the clamp and on the guides, holdingrope dead-ended at one side of the car extending upwardly to and passingover a sheave on the clamp extending across the clamp and thencedownwardly along the op posite side of the car, a drum about which theend of such holding rope is wound, a take-up rope wound about such drumin opposite direction extending generally par-a1 lel with the holdingrope and upwardly along the car about a sheave and thence downwardlytoward the car about a sheave on'the clamp, thence extending upwardly toa sheave on the clamp thence across to a second sheave on theclamp andthence upwardly to a sheave on the guide and thence downwardly to theanchorage for the holding rope.

15. In a car dumper a clamp, guides along which it is adapted to traveltoward and from a car, sheaves on the clamp and on the guides, a holdingrope dead-ended at one side of the car extending upwardly to and passingover a sheave on the clamp extending across the clamp and thencedownwardly along the opposite side of the car, a drum about which theend of such holding rope is wound, a take-up rope wound about such drumin opposite direction extending generally parallel with the holding ropeand upwardly along the car about a sheave and thence downwardly towardthe car about a sheave on the clamp,

thence extending upwardly to a sheave on the clamp thence across to asecond sheave on the clamp and thence upwardly to a sheave on the guideand thence downwardly to the anchorage for the holding rope, theanchorage for holding and take-up rope comprising a pivoted lever, thedrum about which the ropes are wound being-free to rotate when thecradle is in generally upright position, means for locking it againstrotation as the i cradle approaches the dumping position, and

means for rotating the lever at such time to take up on the holding ropeand pay out on the take-up rope. I

16. In a car dumper, a clamp movable toward and from a car, a holdingrope encircling the car and clamp, a take-up rope encircling the car andclamp, a working lever upon which both said ropes are dead ended, a drumabout which said ropes are wound at their ends furthest removed from thelever, the ropes being wound about the drum in opposite directions andleading away from their dead end points on the lever in oppositevdirections. v

17. In a car dumper, a clamp movable toward and from a car, a holdingrope encircling the car and clamp, a take-up rope encircling the car andclamp, a working lever upon which both said ropes are dead ended,

- a drum about which said ropes are wound at their ends furthest removedfrom the lever, the ropes being wound about the drum in 0ppositedirections and leading away from their, dead end points on the lever inopposite directions, sheaves on the clamp and on the supportingstructure about which said ropes travel in oppositionso that movement ofthe clamp causes one rope to wind on and the other wind oil the drum.

18. In a car dumper, a clamp movable toward and from a car, a holdingrope encircling thejzar and clamp, a take-up rope encircling the car andclamp, a working lever upon which both said ropes are deadended, a drumabout which said ropes are wound at their ends furthest removed from thelever, the ropes being wound about the drum in opposite directions andleading away from their dead end points on the lever inopposite 7directions, a brake and means to operate it to look the drum againstrotation after the cradle has made a predetermined excursion toward thedumping position.

19. In a car dumper, a clamp movable toward and from a car, a holdingrope encircling the car and clamp, a take-up rope encircling the car andclamp, a working lever upon which both said ropes are dead ended, a drumabout which said ropes are'wound at their ends furthest removed from thelever, the ropes being wound about the drum in opposite directions andleadingaway from their dead end points on the lever in oppositedirections, a brake and means to operate it to lock the drum againstrotation after the eradle has made a predetermined excursion toward thedumping position, and means associated with the lever adopted to rotateit when the cradle has made a predetermined excursion toward the dumpingposition to exert an increased tension on the holding rope.

20. In a car dumper, a clamp movable toward and from a car, a holdingrope encircling the car and clamp, a take-up rope encircling the car andclamp, a working lever upon which both said ropes are dead ended, a drumabout which said ropes are wound at their ends furthest removed from thelever, the ropes being Wound about the drum in opposite directions andleading away from their dead end points on the lever in oppo sitedirections, sheaves on the clamp and on the supporting structure aboutwhich said ropes travel in opposition so that movement of the clampcauses one rope to wind on and the other wind off the drum, a brake andmeans to operate it to lock the drum against rotation after the cradlehas made a predetermined excursion toward the dumping position and meansassociated with the lever adopted to rotate it when the cradle has madea predetermined excursion toward the dumping position, to exert anincreased tension 0 the holding rope.

Signed at Chicago, county of Cook, and State of Illinois, this 5th dayof June. 1928.

ELWIN H. KIDDER.

